watchexec/src/notification_filter.rs

109 lines
2.7 KiB
Rust

extern crate glob;
use gitignore;
use std::io;
use std::path::{Path, PathBuf};
use self::glob::{Pattern, PatternError};
pub struct NotificationFilter {
filters: Vec<Pattern>,
ignores: Vec<Pattern>,
ignore_file: Option<gitignore::PatternSet>,
}
#[derive(Debug)]
pub enum Error {
BadPattern(PatternError),
Io(io::Error),
}
impl NotificationFilter {
pub fn new(current_dir: &Path,
filters: Vec<String>,
ignores: Vec<String>,
ignore_file: Option<gitignore::PatternSet>)
-> Result<NotificationFilter, Error> {
let cwd = try!(current_dir.canonicalize());
let compiled_filters = try!(filters.iter()
.map(|p| NotificationFilter::pattern_for(&cwd, p))
.collect());
let compiled_ignores = try!(ignores.iter()
.map(|p| NotificationFilter::pattern_for(&cwd, p))
.collect());
for compiled_filter in &compiled_filters {
debug!("Adding filter: {}", compiled_filter);
}
for compiled_ignore in &compiled_ignores {
debug!("Adding ignore: {}", compiled_ignore);
}
Ok(NotificationFilter {
filters: compiled_filters,
ignores: compiled_ignores,
ignore_file: ignore_file,
})
}
fn pattern_for(cwd: &PathBuf, p: &str) -> Result<Pattern, PatternError> {
let mut path = PathBuf::from(p);
if path.is_relative() {
path = cwd.join(path.as_path());
}
if let Ok(metadata) = path.metadata() {
if metadata.is_dir() {
path = path.join("*");
}
}
Pattern::new(path.to_str().unwrap())
}
pub fn is_excluded(&self, path: &Path) -> bool {
let path_as_str = path.to_str().unwrap();
for pattern in &self.ignores {
if pattern.matches(path_as_str) {
debug!("Ignoring {:?}: matched ignore filter", path);
return true;
}
}
for pattern in &self.filters {
if pattern.matches(path_as_str) {
return false;
}
}
if let Some(ref ignore_file) = self.ignore_file {
if ignore_file.is_excluded(path) {
debug!("Ignoring {:?}: matched gitignore file", path);
return true;
}
}
if !self.filters.is_empty() {
debug!("Ignoring {:?}: did not match any given filters", path);
}
!self.filters.is_empty()
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error::Io(err)
}
}
impl From<PatternError> for Error {
fn from(err: PatternError) -> Error {
Error::BadPattern(err)
}
}